Rage

Remarkably, the veteran German power metal band Rage soldiers
on, becoming one of the most prolific metal bands ever as they
continue to record steadily, as they have ever since their
inception as Avenger in the mid-eighties (they changed name
after two albums to avoid a conflict with a British band of
the same name).
Led as always by bassist/singer Peavey, the basic style of
Rage, distinctive despite staying within the basic power metal
ethic,
really hasn't changed a lot over the years (save some
orchestral experimentation on albums such as
Lingua Mortis
and XIII),
yet they have consistently released solid albums and remain
a popular band in Europe and Japan.